Adjustable bed



FIG. 1 is a perspective view of an adjustable bed in accordance with the present invention with the head board in a lowered position;

FIG. 2 is a perspective view of the adjustable bed of FIG. 1 with the head board in a raised position; and,

FIG. 3 is an additional perspective view of the adjustable bed of FIGS. 1 and 2 with the head board in the raised position.

The broken lines shown in the Figures are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for an adjustable bed, as shown and described. 